Most of the process of the CPU dependent codecs are PRO-SUMER codecs. MXF, DPX and ProRes are not as CPU dependent. Most of the professional codecs use less CPU power, and yes, Final Cut Pro X is a toy. No one in any professional edit or tv environment or film for that matter uses Final Cut Pro X. It is a toy.
I could name a million reasons why Final Cut Pro X is a toy. Just ask why we can't or will never use Final Cut Pro X for professional tv work. It can't be done.
Dude, I respect your profession, but your ignorance is embarrassing. Guess what the BBC uses? One of the biggest news organizations in the world. Yup you guessed it, FCPX. Ever of heard of the film "Focus" with Will Smith and Margot Robbie? FCPX. What about "Whiskey Tango Foxtrot"? FCPX. To call FCPX a toy and that no one does or will ever use it for professional work is incredibly narrow minded of you. I know plenty of professional editors that uses FCPX on a daily basis. The reason most studios don't use it, is because of it's lack of shared workflow. It's one of it's shortcomings. Your argument might have been valid in 2011, but it's 2017 and FCPX has come a long way.